p5-Locale-Codes: update to 3.55.

VERSION 3.55  (2017-11-17; sbeck)

NEW CODE(s)

(*) Deprecated in core

Because correct usage of any of the Locale::Codes modules requires that
they be kept up-to-date, I have long felt that it should not be distributed
as a core module.  After discussion on the perl5-porters list, it is agreed,
and the deprecation process has been started.

Changes from a github pull request applied

A couple minor changes (updated .travis.yml to include newest versions of
perl; and a couple changes to pod_coverage.t) reported by lancew on GitHub.

Got rid of Build.PL

Simplified things by only supporting one of Makefile.PL/Build.PL (and the latter
has been removed from perl core some time ago).  RT 123572

Fixed INSTALLDIRS

The behavior of installing core modules changed in 5.12 a bit, and Makefile.PL
now reflects that.  RT 123571

(wiz)